Inseam-triiviming machine



3 Sheets'Sheet 1.

(No Model) B. S. HAR'RIS INSEAM IRIMMING MACHINE.

Patented Pb. 1, 1898.

3 Shets Sheet 2.

Patented Feb. 1, 1898 E. S. HARRIS.

Y INSEAM TRIMMING MACHINE.

(N0 Mocel.)

WTNIEEEEIE (No Model.) 3 Sheets-Sheet 3.

E. S. HARRIS. INSEAM TRIMMING MACHINE.

Patented Feb. 1, 1898.

\XATNEEEEE:

not in operative position.

rnrns ATENT FFIQEt ELMER S. HARRIS, OF HAVERHILL, MASSACHUSETTS, ASSIGNOR TO THE GOODYEAR SHOE MACHINERY COMPANY, OF PORTLAND, MAINE.

lNSEAM- TRINIMlNG MACHlNE.

SPECIFICATION forming part of Letters Patent No. 598,223, dated February 1, 1898. Application filed MayZZ, 1896. Serial No. 592,528. (No model.)

To all whom it may concern.-

Be it known that I, ELMER S. HARRIS, of

Haverhill, in the county of Essex and State of of machines for trimming off the surplus material of the welt, upper, and insole of a welted boot or shoe commonly known as an inseamtrimming machine.

The present invention has for its object to provide an improved means for progressively presenting to the work different portions of' the cutting edge of the cutter, so that if one portion of the cutter becomes dull by contact with a tack or other substance a new portion is brought into operation.

The present invention has for its further object to provide a sharpening device to operate upon a portion of the cutter removed from the portion thereof then performing the cutting operation which is thereafter brought into position to make the out.

To the above ends the present invention consists of the combination, with the cutter, of means for imparting thereto a to-and-fro motion in opposite directions to make the cut and a progressive movement in one direction to brin g successive portions of its cutting edge into operative position. i

The present invention further consists in the combination, with the cutterhaving the movements above described, of a grinder ar-- ranged to operate upon portions of the cutter The present invention further consists of a new and useful combination of mechanical elements independent of their connection with the machine herein illustrated, as hereinafter described and claimed The accompanying drawings illustrate my In the accompanying drawings, Figure 1 represents a plan view of the mechanism embodyingmyiinprovemen ts. Fig. 2 represents a side. elevation of the same. Fig. 3 represents a section on line 3 3 of Fig. 1, the parts being somewhat enlarged. Fig. erepresents an enlarged sectional detail on line 4 i of Fig. 1. Fig. 5 represents a detail section 011 line of Fig. 4. Fig. 6 represents an enlarged section on line 6 6 of Fig. 2, the grinding Wheel being omitted. Fig. 7 represents a detail elevation of a modified form of parts of the mechanism.

. Similar reference characters indicate the same parts throughout the several views.

In the drawings, a represents aportion of the base or standard of the machine, and a. represents the arm of said standard which supports the operative parts of the mechan ism embodied in my present invention. Secured to the side of the arm a is a casting or bracket a which is somewhat S-shaped in elevation, as shown in Fig. 3, said bracket being provided with bearings to permit both a rotary and longitudinal movement therein of a shaft 6, a portion of which is threaded to form the worm b. Fitted between two opposing surfaces of the bracket a and surrounding the shaft 19 is a worm-wheel b the hub of which is provided with two screws 12 having squared inner ends I), (see Fig. 5,) which enter the longitudinal groove 12 in the shaft b. This construction permits of the shaft 1) being reciprocated while being gradually rotated by a worm c, engaging the wormwheel (2 The worm c is formed at one end of a shaft 0', mounted in suitable bearings supported by the arm a. and having a beltpulley c at the other end.

01 indicates the main driving-shaft of the machine, having a wrist-pin d, which is con-v nected by means of a pitman 612 with a collar (1 secured to the end of the shaft 1), whereby the said shaft 1) may be rapidly reciprocated while being slowly rotated by means of the worm c and worm-wheel b At the end of the arm a of the frame and underneath the shaft b is a fork a of said arm, within which is aworm-wheel e, secured on a shaft c',mounted in bearings in said fork,

said shaft e having at its outer end the wheel e around the periphery of which is secured the band of steel forming the cutter e the details of construction of said cutter-wheel not forming a part, however, of the present invention. The worm-wheel e is engaged by the Worm b of the rotary and reciprocating shaft 1), and therefore the cutter-wheel, while being given a rapid rotary oscillating motion due to the rack-and-pinion operation of the worm b and worm-wheel e, is gradually or progressively advanced or rotated by the slow worm-screw action of said worm and wormwheel; Each rotary oscillating movement of the cutter-wheel therefore slightlyadvances the position of any single point of the cutting-blade, so that new portions of said cutting-blade are being constantly brought into operative position to trim the work.

Secured to the arm a is a bracket f, provided with bearings for the shaft of a grind ing-wheel f, Whichgrinding-wheel may be raised or depressed, so as to be brought into engagement with or retracted from the periphery of the cutter, so that when it is deemed necessary to sharpen the cutter the wheel may be depressed and kept in that position until the cutter has made a complete rotation on its axis. The operation of this grinding-wheel is the same as in my beforementioned application and requires no further description herein.

g represents a feed-wheel, the construction and operation of which is substantially the same as in United States Letters Patent No. 556,146, granted to me March 10, 1896.

In the use of this machine for trimming off the surplus material of the welt, upper, and inner sole of a welted boot or shoe at the seam which unites the said parts the work is held and fed by the feed-wheel in a manner substantially as described in the above -mentioned patent. If the cutter comes in contact with a tack and is injured thereby, it is not necessary to stop the operation of trimming so as to sharpen the cutter, because the gradually-advancing movement of the cutter machine by simply depressing the grindingwheel when the injured portion of the knife arrives at the proper location.

In Fig. 7 Ihave shown my invention as applied to a disk cutter it instead of a cylindrical-shaped cutter represented in Fig. 6.

characters.

It is evidentfrom the foregoing that if the rate of reciprocation of the worm b is suffi- 1 ciently rapid as compared with its rate of roof rotation in one direction, and itis further evident that if the rate of reciprocation as compared to the rate of rotation of the worm b be decreased the extent of the oscillation of the wheel e will be decreased until when the rate of reciprocation of the worm b as compared with the rate of its rotation is relatively slow the wheel 6 will have a continuous motion of rotation intermittently accelerated and retarded by the reciprocation of the worm b.

As applied to the machine of the drawings the function of my improved mechanical movement is to produce an oscillation and progressive rotation of the cutter to present different portions of the cutter to the work, as before stated; but for some mechanical purposes the wheel e may be used to actuate a belt or pitman or other connected mechanism controlling the working parts of a machine and by a mere change in the timing of its elements may be given a variable continuous rotation in the same direction, accelerated and retarded as hereinbefore explained.

Having thus described my invention, I desire to say that the foregoing description of its embodiment in an inseam-trimming machine is given merely for the purpose of illustration, and I do not consider the same in its generic features limited to its application to any particular machine or class of machines; but

I claim as broadly novel and desire to secure by Letters Patent of the United States- 1. The combination with the driving and ICO driven elements, of a gear connection between point of engagement of the gear and worm along the worm as the driving element is rotated, substantially as described.

3. The combination with a cutter, of means to impart a to-and-fro movement thereto to make the cut, and a progressively-advancing movement to bring successive portions of its cutting edge into operative position, substantially as described.

4. The combination with a cutter movable 1 in a circular path, of means to impart to said In Fig. 7 the Worm and worm-wheel connections are substantially the same as in the other figures and bear the same referencev cutter an oscillating movement to make the cut and a progressive rotary movement to bring successive portions of its cutting edge into operative position, substantially as described.

5. The combination with a cutter, of means to impart a to-and-fro movement thereto to make the out, and a progressively-advancing movement to bring successive portions of its cutting edge into operative position, and a grinding device adapted to bebrought into IIO engagement with said cutter, substantially as point of operation of the cutter,'substantia1ly described. as described.

6. lhe combination with a cutter movable In testimony whereof I have signed my in a circular path, of means to impart to said name to this specification, in the presence of 5 cutter an oscillating movement to make the two subscribing Witnesses, this 14th day of I 5 out, and a progressive rotary movement to May, A. D. 1896.

bring successive portions of its cutting edge ELMER S. HARRIS. into operative position, and a grinding de- Witnesses: vice adapted to be brought into engagement 0. F. BROWN,

10 with said cutter at a pointremoved from the A. D. HARRISON. 

